There is another round of updates coming in 2016 that should fix the driver issues, the new (late December) Beta Video driver has fixed the "Black Screen" from Connected Standby, we are now waiting for the updated Power Management Firmware.

As far as the OS, all the issues and glitches I experienced were corrected with the recent updates. My SP4 runs very smooth.
My only honest concern right now is battery life, I have a i5 256GB and battery charge drops faster than expected. I tend to stay around the 25%-30% brightness range. I have only had it for about 2 weeks so I am still in the learning stage.

I just bought the i5 256 model on the morning of New Years eve. The only problem it had out of the box was 2 display driver crashes. Soon as I installed the updates. I had NO issues. Since Dec 31, I've gotten 7-8 hrs battery life. I love this thing. Hope all is good with yours if you decide to purchase.

It is supposed to fix the draining issue, currently Intel's reference drivers for S0iX enabled Skylake SoCs have been unable to put them into a deeper level of "On - low power" which leads to Wake Events that are not within the S0iX design (i.e. Scheduled Tasks, Win32 Code, etc.).

It is supposed to fix the draining issue, currently Intel's reference drivers for S0iX enabled Skylake SoCs have been unable to put them into a deeper level of "On - low power" which leads to Wake Events that are not within the S0iX design (i.e. Scheduled Tasks, Win32 Code, etc.).

I run my SP4 fairly stock with windows hello and Cortana. Of the issues people complain about, I have almost every single one. Do I have a lemon? Is there a lot number associated with those whose devices exhibit none of the above (running stock) ?

For most of the above there are workarounds (not fixes) i.e. host file, hibernate, passive cooling profile, temp wifi reg hack, etc...but it boggles the mind that all of that is necessary on a flagship device meant to showcase Windows 10 at its finest.